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C304 model product photos for maximum enlargement, click on thumbnail; for medium-sized, scroll down

The Cetacean Research™ C304 Hydrophone has a directional receive pattern with very wide frequency response for monitoring ultrasonic signals not detectable by competing brands. The connector is an integral part of the hydrophone. Hydrophones are not individually calibrated but calibrated frequency response measurements can be performed on request.

Linear Frequency Range [kHz]		0.007 to 250+ (±3dB)
Usable Frequency Range [kHz]		0.005 to 250+ (+3/-12dB)
Transducer Sensitivity* [dB, re 1V/µPa]		-203
Preamplifier Gain [dB]		34
Effective Sensitivity* [dB, re 1V/µPa]		-169
Power Requirement [Vdc]		5 to 32
Maximum Operating Depth ** [m]		460
Operating Temperature Range [ºC]		-40 to 60
RMS Overload Acoustic Pressure [dB, re 1µPa]		173 to 190
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa]		~ 63
Output Impedance []		2.5
Dimensions [cm]		8.3L x 3.2W x (0.6 to 2.5)T
Integral Connector†		Subconn MCBH3MSS
*  Transducer Sensitivity + Preamplifier Gain = Effective Sensitivity. **  1,000 meter versions are available. Append "-1k" to the model number to order a hydrophone with a depth rating >1,000 meters. † Connectors are rated to a depth of 7,000 meters; see below for mating connector and cables.

Battery / Connector box Battery boxes are rated NEMA-4X water resistant (excluding connectors). Standard signal connection for the Cetacean Research™ C304 hydrophone is through a watertight BNC connector. The hydrophones are powered by a single 9V battery (not included). Signal Output female BNC Battery Life [hours] 20 Box Dimensions [cm] 9.8 long x 6.4 wide x 4.0 high